Commutator for dynamo-machines.



C. A. VANDERVELL & A. H. MIDGLEY.

COMMUTATOR FOR DYNAMO MACHINES,

APPLICATION FILED MAY 6,1913.

1,143,666. Patented June 22, 1915.

Q S* '**:T "S= F-i |v| I ECP P! H 3 i f zggl E S ,Qflf V l W INVENTORS WITNESSES MW BY 7 MM$KTTORNEY THE NORRIS PETERS 60.. FHDTG-LITHO, WASHINGTON. D. c.

pe nies A mara: a sumes; A

J sl sfififi, l 1 7 Applicationfiled-may 6,1913. SeriaINoJ7655832.

' 'coiyrmuraron role DYuAMo-M- cnrnns.

all whomit mayc oncern;

v i 3 "Belt-known that .we,1C r IARLEs.;Ai-ITnoNY "VANnERvE L and Q'A BER HENRY "MIDGLEY, V bo'th: subjects of-the King ofiGrea't Britain and; Ireland, and bothi residing: :ati, 'Warple W'ay, Acton Vale, i'nTthe' county. of-Middlef'seX, England, have invented. a certain new {and useful commutator for; Dynamo-Ma chines, of which-theffollowing is-a specifica This invention relates to an improved contion.

l structiongo f dynamo electric machines of the kind inwhi'chthearmature and the commuf =tator- 'are stationary; and" are -used' in con f is I: junction-with stationary 'slip rings and with Ot y' brushes;

7 fITh ObjQGtQof the present invention is to providefsimplifie'd and amore 1 compact dynamo machine ofathe fkind above 're- "*JInfthedynamo constructed according to ferredltoz v thepresentinvention thexcontact surface: of thejc mmutator is arrangediin' the; same planeas the contactsurface of theislip ring,

J i. ousl'y -makingl contact "With the commutator V Rand the slip ringys'o as to commutateand nd single brush is used" for simultane- I collect the current 1 in a well known manner,

l andljat the same time lead the collected curii i i The improved construction is illustrated -in theaccompanying' drawings in connection rent to} the stationary slip ring.-

, with a machineflhaving a:stati0nary arma- 'ture' andistat onary exc tation windings arranged between an inner and an outer ring, provided ona flywheel andcformed with Ypolar projections'which together with the l excitation windings fact as the; magnet field system of; the machine. L 1

q Figure 118 a part side 'elevation o f the J .machine shown in'section partly along the line of Fig. 2, and-partly along the v line 'YY' offs-the same figure, Fig. 2 is a i plan view thereof; f

' {cross sectionof the machine, and Fig. 3 a

: Referringto the accompanying drawings,

- ,0; is lafflywhe'el or-cother rotary member I a mounted, on an engine ,orother shaft '5 and- "-Qprovide'd with two concentric annular flanges of and d.- .The space betweenthe flanges 0 5 and dis utilized to accommodate stationary f fieldexcitationwindings. 6,0 and a as well Liasthe armature f and the windings f 'there on,'. the parts'ofthe annular flanges. facing the ,,armature being provided with suitable I Specification of was Patent.

D-: ,T H NR -mumm or ACTON VALE, ENGLAND. t v c Patented J 1111622, 1915.

recesses and-projections and the latter constituting the poles which together with the other parts of the flanges and the part of the flywheel surrounding j the excitation fwindings form theimagnetic field system. The arrangement of the magnetic field system is such thatallythe projections formed on the flange 0 act as north poles-l\ andrall those formed'onthelflange cl as south poles S, the v y I poles Nton the flange a lying opposite the,

* recesses flaw in the flange d and the .pol e's S are supported ;in a casing l preferably of brass,-which is suitably'secured to the arma ture. The leading ofi wires m of "the exact as main series windings, auxiliaryseries wmdmgsand shunt wmdmgs respectively, are: a rrangedr1nfront of. the armature and citation windings arepassed through suitableholes m formed in the ironQcore of the armature and provided with suitable bushes n and are connected to the terminal contacts N on the stationary frame j. I

The commutator is attached to the stationary frame 3' while the'brushes are mounted on the flywheel a, thus rotatingtherewith.

The'commutatoris preferably arranged to he inthe space 0, between the engine shaft and the inner flange of the flywheel and it "comprises two specially constructed slip rings p and 20, against theends of which abut the positive and "negative brushes q 91 vE P t y, and commutator segv ments 1- supported by said slipirings. The

vided onthe frame y' by means of fixing screws 8, suitably insulated from said flange, is provided with acomb-like portion the teeth 12?; of which engage inspaces left free between the commutator segments, portionsof which are cut away for this purpose and the end surfaces of the teeth being flush with the end surfaces of the commutator segments. The slip ring p the end surface of which is also flush with the end surfaces .of the commutator segments is provided with an extension upassing through a ring ring vg2 which is secured to a flange 8 pro-' l5 sorewsgR and R and insulated therefrom by an insulating plate :0, the. brushes 9 ofuone which is I secured to the frame All the commutator segments: are suitably insulated u from the'sliprings r I Theipositiveand nega-ti veibrushesare siip; "ported; by'two. concentric. plates Q: and Q respectively secured to th e5-*fiywheel' by polarity being'adapted; to remain in contact 7 I withfthe'teeth t. of the slipringp and-lwith the commutator segmentsir and the brushes of the other polarity withthefiother'slip I ring 10 and commutator segments. J Each brushis mounted in a brushliolder and is 2s Pressed aga s e} et r fby a fHaving now describedour Sinvention, what we claim asnew and desire to secure hyLetters Patent is commutatorsegmentsarranged between the teeth of said "slip ring andinsulated there- Zfro1n5the'teethofthefslipringjand'the com: r V

prisinga slip ring provided with teeth, com-4f tion and. two. concentric sets; oi br.ushes, 'one "ring; and the othersetof brushes against v 'the otherf-slip, ring "and the commutator, seg-L a V A commutat1ng and current collecting ,dev ice forcontinuous current dynamos 'comprising a'slipvring'provided with teethfan'dmutator segments having their Contact. S111? h faces arranged in one and the same plane L and a dynamo bruShLaButtinQagainst-the commutator segments and the teeth of'the} slip ringas and for the purposes set forth. t 2; Acommutating and current collecting 4 de iCQ for continuous'current dynamos com:-

mutator'isegments arranged between the teeth of said slip ring and insulated therefrom; theteeth of theslip ringand the commu-j' tator'gse'gments having their contact :su'rs faces arranged in one and thesameplandi another slip ring engaging-swith the commu 7tatersegmentsiinsulatedtherefrom"andarso it rangedjwith its contact surface iniithe'isame Qplane asthe contact slurfa'oeof "the fcommu" :tator segments; a fixing rlng for clamping theonefslip;ring' to' the. other slip ring, and

for fixing the commutator. segments in po'si -g set or brus es. abutting against the commu- 'tator" segments and the teeth of one "slip ments, asand for the-purposes set'forth." M j testimony whereofwehave signed? our namesfto this specification inthe presence of two subscribing witnesses. I r Y "CHARLES ANTHONY VANIiERvELtEQY j tizraruruur mnetrr Witnesseshgi :1 if. gBERTBAM H; WALEE RJ; SKER'PElYQ r 

